I have already uploaded my index.html file into the "public_html" folder, but the index.html still doesn't work. I have used godaddy 2 years, yesterday I spend so much time on fixed this problems. I have never seen this problem before. I think I should consider change the other server
In your title there you used a capital 'I' as Index.html,
you didn't name your index with a capital 'I' did you?
Your index.html file should open up in a browser on your home computer if you double click it. It won't be pretty but it should still open up on a double click (right click)